scholarly journals Chemical compatibility screening test results

1997 ◽  
Author(s):  
P.J. Nigrey ◽  
T.G. Dickens
Keyword(s):  
Screening Test ◽  
Test Results ◽  
Chemical Compatibility

scholarly journals Is it enough for COVID-19 screening test? Limitation of swab test and general characteristics of mild symptom patients

2021 ◽  
Vol 104 (2) ◽  
pp. 003685042110261
Author(s):  
Sungwoo Choi ◽  
Hyo Jeong Choi ◽  
Ho Jung Kim
Keyword(s):  
Screening Test ◽  
Community Treatment ◽  
Upper Respiratory Tract ◽  
Test Results ◽  
Rt Pcr ◽  
Pcr Assay ◽  
Positive Rate ◽  
Upper Respiratory ◽  
Polymerase Chain ◽  
Discharge Criteria

The most common method for SARS-CoV-2 testing is throat or nasal swabbing by real-time reverse transcription polymerase chain reaction (RT-PCR) assay. In South Korea, drive-through swab test is used for screening system and community treatment centers (CTCs), which admit and treat confirmed COVID-19 patients with mild symptoms, are being used. This retrospective study was conducted on patients admitted to a CTC on March 6, 2020. A total of 313 patients were admitted. The nasal and throat swabs were collected from the upper respiratory tract, and a sputum test was performed to obtain lower respiratory samples. The positive rate of the first set of test, sputum test was higher than that of the swab test ( p = 0.011). In the second set of test, 1 week after the first ones, the rate of positive swab tests was relatively high ( p = 0.026). In the first set of test, 66 of 152 (43.4%) patients showed 24-h consecutive negative swab test results, when the sputum test results were considered together, that number fell to 29 patients (19.1%) ( p < 0.001). Also, in the second set of test, 63 of 164 (38.4%) patients met the discharge criteria only when the swab test was considered; that number fell to 30 (18.3%) when the sputum test results were also considered ( p < 0.001). Using the swab test alone is insufficient for screening test and discharge decision. Patients who may have positive result in the sputum test can be missed.

Towards a more rational approach to chemical compatibility testing of clay

2002 ◽  
Vol 39 (3) ◽  
pp. 597-607 ◽  
Author(s):  
J K Kodikara ◽  
F Rahman ◽  
S L Barbour
Keyword(s):  
Boundary Condition ◽  
Hydraulic Conductivity ◽  
Rigid Wall ◽  
New Technique ◽  
Rational Approach ◽  
Lateral Strain ◽  
Test Results ◽  
Chemical Compatibility ◽  
Test Technique ◽  
Flexible Wall

Chemical compatibility tests using hydraulic conductivity testing with chemical permeants are normally undertaken to assess the integrity of compacted clayey liners used for waste containment. This paper highlights the fact that current routine methods of flexible wall and rigid wall testing techniques fail to represent the zero lateral strain boundary condition that is required to realistically represent the field situation. The test results indicate that flexible wall permeameters underestimate the likely increases in hydraulic conductivity due to chemicals, while the rigid wall permeameters can severely overestimate these effects. A new test technique, which incorporates the zero lateral strain condition in a simple manner, is presented. This technique involves the use of a rigid wall concept in a flexible wall permeameter. A split rigid mould is used to encase the soil specimen that is glued to the internal surfaces of the mould, to apply the zero lateral strain boundary condition. The new technique is shown to be suitable for both chemical compatibility and desiccation testing. The tests were undertaken with varying concentrations of saline water, methanol, and landfill leachate. The test results indicate that the new technique produces results that fall between the results obtained from flexible wall and rigid wall permeameters. It is argued that the new test technique provides a more rational approach for chemical compatibility testing than the current rigid wall and flexible wall techniques.Key words: soil, hydraulic conductivity, chemical compatibility, landfill, permeameter, boundary condition.

scholarly journals Set theoretic approach to the concept of net sensitivity and net specificity in screening test results

2018 ◽  
Vol 5 (5) ◽  
pp. 1690 ◽  
Author(s):  
Bansi Badan Mukhopadhyay ◽  
Himadri Bhattacharjya
Keyword(s):  
Sensitivity And Specificity ◽  
Set Theory ◽  
Screening Test ◽  
Basic Knowledge ◽  
Screening Tests ◽  
Theoretic Approach ◽  
Test Results

Net sensitivity and net specificity have been reviewed from set theoretic approach. With a basic knowledge of set theory one can estimate the net sensitivity and specificity in an easy way in both sequential and simultaneous screening tests. Union, intersection and complementary operations of set theory have been adopted to find out the solutions. 

scholarly journals Effect of anti-epileptic drugs on first trimester screening test results

2020 ◽  
Vol 59 (6) ◽  
pp. 835-837
Author(s):  
Canan Unal ◽  
Atakan Tanacan ◽  
Erdem Fadiloglu ◽  
Oytun Portakal ◽  
M. Sinan Beksac
Keyword(s):  
Screening Test ◽  
First Trimester ◽  
Test Results ◽  
First Trimester Screening ◽  
Trimester Screening

scholarly journals Non-literal language and semantic dementia

2013 ◽  
Vol 7 (4) ◽  
pp. 424-427
Author(s):  
Mariana Ribeiro Hur ◽  
Leonardo Caixeta
Keyword(s):  
Alzheimer’S Disease ◽  
Frontotemporal Lobar Degeneration ◽  
Screening Test ◽  
Poor Performance ◽  
Semantic Dementia ◽  
Test Results ◽  
Language Abilities ◽  
Attention Span ◽  
Language Interpretation ◽  
Low Performance

ABSTRACT Semantic dementia is characterized by fluent, phonologically adequate speech with various anomias and semantic paraphasias. Performance on semantic tasks is well documented in these patients, although little is known regarding performance on more complex language tasks, such as those involving non-literal language (interpretation of metaphors and proverbs and recognition of irony). Objective: To report the investigation of non-literal language in cases of semantic dementia. Methods: Two cases of semantic dementia were investigated for the presence of deficits in non-literal language abilities using the screening test for Alzheimer's disease with proverbs, metaphor test and irony test. Results: Both patients were found to have low performance on the tests applied, particularly for interpretation of proverbs. Conclusion: This poor performance was attributed largely to the characteristic semantic changes of the disease, but some frontal symptoms inherent to other forms of frontotemporal lobar degeneration were also observed which interfered in the testing, such as negativism, reduced attention span, concretism and perseverations.

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